On a few points of general principle: I would suggest not relying on what is merely perceived to be "understood practice in real life courts". Evidence law is, especially recently, evolving. Even within the English legal tradition, codification has led to changes. Different jurisdictions do have different rules, and none are intrinsically better than others.
More fundamentally, the entirely different context actually makes it undesirable for strict application of RL evidence law in our courts here. We are a single, rather small community (in RL terms), where the amount of people who are happy to take on the role of representing a side to a legal dispute are limited. Then, those representatives are not people who practice TNP law for a living.
So I would submit that, when deciding on which questions are accepted and which evidence admitted, the Court should pay far more notice to what fairness and the interests of justice require here, and in the particular case and context, rather than applying RL law.
Pierconium and Aleisyr will be testifying for the prosecution. Given the evidence adduced so far, I am certain that defence counsel can deduce the type of questioning will occur. I am also certain that defence counsel can come up with a line of questioning in cross-examination that is directly relevant to this case and fair, within the guidelines posted by the learned Chief Justice above.
In short, I do not see the reason for the struggle defence counsel seems to be having to have his line of questioning pre-cleared. I also do not see the need to declare these witnesses hostile. They are our witnesses, obviously more leeway will be given to defence counsel in cross-examination.
With regards to the expert witness called by the defence, we would note our objection to any leading question other than ones which would rely on whatever exeprtise the defence is claiming the witness has, and in regards to a hypothetical. We do not believe that the interests of justice are served at all by allowing defence to ask leading questions of their witness with regards to this case. Even with regards to hypotheticals, we reserve the right to object to the questioning if we deem it to be attempting to elicit a particular opinion from the witness, rather than pose various situations to them.
We have not heard from the defence nor the judge as to whether the suggested time is suitable for them. I believe that Pierconium will be on IRC.